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dist-i686-msvc hang on lint-docs #158378

Closed
#162288
Closed
dist-i686-msvc hang on lint-docs#158378
#162288
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A-CIArea: Our Github Actions CIC-bugCategory: This is a bug.O-windows-msvcToolchain: MSVC, Operating system: WindowsO-x86_32Target: x86 processors, 32 bit (like i686-*) (also known as IA-32, i386, i586, i686)P-highHigh priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

Description

@JonathanBrouwer
JonathanBrouwer
opened on Jun 24, 2026

On dist-i686-mscv, lint-docs consistently hangs in CI.
Example run: #158342 (comment)

In this try build I added some extra logging: #158363 (comment)
The last thing this prints is:

  [lint-docs] Generating output for missing_debug_implementations
  compiling lint missing_debug_implementations
  running: "D:\\a\\rust\\rust\\build\\i686-pc-windows-msvc\\stage1\\bin\\rustc.exe" "--edition=2024" "-Zunstable-options" "--error-format=json" "--target" "i686-pc-windows-msvc" "lint_example.rs"
  #![deny(missing_debug_implementations)]
  pub struct Foo;
  fn main() {}

I've ran this multiple times and it always gets stuck on this point

Zulip thread: #t-infra > dist-i686-msvc hang @ 💬

Activity

  1. JonathanBrouwer
    added
    C-bugCategory: This is a bug.
    on Jun 24, 2026
  2. rustbot
    added
    needs-triageThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triaging
    on Jun 24, 2026
  3. jhpratt
    added
    A-CIArea: Our Github Actions CI
    P-highHigh priority
    P-criticalCritical priority
    and removed
    needs-triageThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triaging
    P-highHigh priority
    on Jun 24, 2026
  4. rust-bors
    added a commit that references this issue on Jun 24, 2026

    Auto merge of #158379 - JonathanBrouwer:i686-workaround, r=Mark-Simul…

    5647c58
  5. jhpratt
    linked a pull request that will close this issueWorkaround: Skip rustc book on i686 #158379on Jun 24, 2026
  6. jhpratt
    removed a link to a pull requestWorkaround: Skip rustc book on i686 #158379on Jun 24, 2026

  7. jhpratt commented on Jun 24, 2026

    @jhpratt
    jhpratt
    on Jun 24, 2026
    Member

    For others not involved in this, this will be temporarily worked around by #158379. It is not a long-term fix as it disables part of CI.

  8. rust-bors
    added a commit that references this issue on Jun 24, 2026

    Auto merge of #158379 - JonathanBrouwer:i686-workaround, r=Mark-Simul…

    3bfa380

  9. ChrisDenton commented on Jun 24, 2026

    @ChrisDenton
    ChrisDenton
    on Jun 24, 2026
    Member

    I've not yet been able to reproduce this locally. It might be more productive to use CI to debug this, which is admittedly more difficult.

  10. rust-bors
    added 2 commits that reference this issue on Jun 25, 2026

    Auto merge of #158379 - JonathanBrouwer:i686-workaround, r=Mark-Simul…

    ba58307

    Auto merge of #158379 - JonathanBrouwer:i686-workaround, r=Mark-Simul…

    2c251b5

  11. 7 remaining items

  12. mati865 commented on Aug 6, 2026

    @mati865
    mati865
    on Aug 6, 2026
    Member

    @apiraino rust-lang/compiler-team#1020 is about another target.
    i686-msvc demotion RFC progress seems to be halted https://rust-lang.zulipchat.com/#narrow/channel/131828-t-compiler/topic/Demoting.20.60i686-pc-windows-msvc.60.20to.20Tier.202.3F/with/609294663

  13. jieyouxu commented on Aug 15, 2026

    @jieyouxu
    jieyouxu
    on Aug 15, 2026
    Member

    RFC + FCP proposing dropping i686 msvc host tools: rust-lang/rfcs#3999

  14. jieyouxu commented on Aug 25, 2026

    @jieyouxu
    jieyouxu
    on Aug 25, 2026
    Member

    I'm going to actually downgrade this from P-critical => P-high, since (1) the host tool demotion RFC for i686 msvc is in FCP, and (2) this is worked around and is no longer release blocking.

    @rustbot label: -P-critical +P-high

  15. rustbot
    added
    P-highHigh priority
    and removed
    P-criticalCritical priority
    on Aug 25, 2026
  16. rust-bors
    added a commit that references this issue on Sep 9, 2026

    Auto merge of #162288 - mati865:i686-msvc-no-host, r=jieyouxu

    32ffad3
  17. rust-bors
    closed this as completedin 32ffad3on Sep 9, 2026
  18. pull
    added a commit that references this issue on Sep 10, 2026

    Auto merge of #162288 - mati865:i686-msvc-no-host, r=jieyouxu

    f6e5278
  19. JonathanBrouwer
    added 3 commits that reference this issue on Sep 11, 2026

    Rollup merge of rust-lang#162577 - jieyouxu:i686-msvc-no-host-tools, …

    3fe9a35

    Rollup merge of rust-lang#162577 - jieyouxu:i686-msvc-no-host-tools, …

    0fe5b2b

    Rollup merge of rust-lang#162577 - jieyouxu:i686-msvc-no-host-tools, …

    cb19006
  20. Zalathar
    added a commit that references this issue on Sep 11, 2026

    Rollup merge of rust-lang#162577 - jieyouxu:i686-msvc-no-host-tools, …

    b475daf
  21. rust-bors
    added a commit that references this issue on Sep 11, 2026

    Unrolled build for #162577 in rollup 162631

    20d15c7
  22. github-actions
    added a commit that references this issue on Sep 14, 2026

    Auto merge of #162288 - mati865:i686-msvc-no-host, r=jieyouxu

    0b6ba52
  23. pull
    added a commit that references this issue on Sep 21, 2026

    Auto merge of #162288 - mati865:i686-msvc-no-host, r=jieyouxu

    1287aeb
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    A-CIArea: Our Github Actions CIC-bugCategory: This is a bug.O-windows-msvcToolchain: MSVC, Operating system: WindowsO-x86_32Target: x86 processors, 32 bit (like i686-*) (also known as IA-32, i386, i586, i686)P-highHigh priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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